Question

Calculate the number of moles present in 646g of ammonia NH3

Answer 1

Answer:

38 mol

Explanation:

NH3 molecular formula 14 + 3 x 1

= 17

no. of moles = gram weight / molecular weight

= 646 / 17

= 3

Hope this helps !!!

Answer 2

Given - Amount of ammonia : 646 gram.

Find - Number of moles present in given amount of ammonia.

Solution - Number of moles present in ammonia can be calculated by the formula : mass of ammonia/molecular mass of ammonia.

As we know molecular mass of ammonia is 17 gram/mol.

Keeping the values in formula -

Number of moles = 646/17

Number of moles = 38

Hence, 646 gram of ammonia has 38 moles.